Winnebago Adventurer Roof issues

I have a 2000 Winnebago Adventurer and about two years ago the fiberglass roof was sucked out of the aluminum channel by a combination of cross wind and passing tractor trailer. Drivers side front to back roof peeled up and all the foam insulation sucked out. I duct taped it together and drove home, I reinserted the fiberglass and glued secured it with urethane caulk/adhesive. Here's the kicker, I swear, there was never any adhesive in the roof to aluminum track. Both sides of the motorhome were like that. I assumed Winnebago left it loose so it could move when the motorhome flexed.
Wheel wells attached with pressure sensitive tape, most of the end cap accessories glued on with epoxy, how could we expect anything remotely resembling quality construction!